Removal of Impurities fromWaste Oil by Combination of Eggshell and Eggshell's active Carbon for Biodiesel ProductionZohrehDidarYoung Researchers and Elite Club, Neyshabur Branch, Islamic Azad University, Neyshabur, Iranauthortextarticle2017engWaste oil is an inexpensive source for biodiesel production, but the high amount of impurities present (free fatty acids, oxidation products) impedes its practical application. The aim of this work is to assess the purification efficiency of the adsorption process with eggshell and its active carbon. Carbonization of eggshell was done at 200 ºC for 4 hours. For activation of the resultant carbon, sulfuric acid was used, and finally, thermal activation (600 ºC, 1 hour) was performed. The quality parameters of waste oil (free fatty acid, peroxide value, color indices, viscosity, and density) were determined before and after the adsorption process. The results showed an improvement pattern in the measured parameters after the adsorption. Reduction in peroxide and acid value were 71.7% and 51.72%, respectively. Also, produced biodiesel from treated waste oil has better quality indices including acidity, viscosity and specific gravity. Biodiesel yield also increased up to 40 percent.Journal of Advances in Environmental Health ResearchKurdistan University of Medical Sciences2345-39905

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2017123130http://jaehr.muk.ac.ir/article_56091_a761f7e7bb9af835f31647d72ea000c2.pdfdx.doi.org/10.22102/jaehr.2017.74840.1007Investigation of the performance and accuracy of multivariate timeseries models in predicting EC and TDS values of the rivers of Urmia Lake BasinMohammadSoleimaniPhD in Water Science and Engineering,
Directorate of Piranshahr health center, Urmia University of medical SciencesauthorKeivanKhaliliAssistant Professor, Department of Water Engineering, University of Urmia, Urmia, IranauthorJavadBehmaneshAssociate Professor, Department of Water Engineering, University of Urmia, Urmia, Iranauthortextarticle2018engConsidering the complexity of hydrological processes, it seems that multivariate methods may enhance the accuracy of time series models and the results obtained from them by taking more influential factors into account. Indeed, the results of multivariate models can improve the results of description, modeling, and prediction of different parameters by involving other influential factors. In this study, univariate models (ARMA) and auto-correlated multivariate models with the simultaneous autoregressive moving average model (CARMA) were evaluated for modeling Electrical Conductivity and Total Dissolved Solid parameters of the western stations of Urmia Lake Basin. To use the CARMA models, annual flow rate time series, EC, TDS, SAR, and pH values measured across seventeen hydrometric stations between 1992 and 2013 were used. In the studied statistical period, the river flow in the west of Urmia Lake Basin decreased and experienced an incremental increase compared to the EC and TDS values in river flow. By applying influential parameters in CARMA models, the mean error value of the model in training and experimental stages reduces by 32% and 44% for EC values and 34% and 36% for TDS values, respectively.Journal of Advances in Environmental Health ResearchKurdistan University of Medical Sciences2345-39905

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2018131138http://jaehr.muk.ac.ir/article_55252_59a62b5a7d333113a6be60ad11789054.pdfdx.doi.org/10.22102/jaehr.2017.74712.1006Improved removal of Trinitrotoluene (TNT) from contaminated soil by inducing aerobic process: kinetic and chemical byproductsMohammad AminKaramiNutrition Health Research Center, Department of Environment Health, School of Health, Lorestan Medical Sciences University, Khoramabad, Iran.authorBahramKamarehieNutrition Health Research Center, Department of Environment Health, School of Health, Lorestan Medical Sciences University, Khoramabad, IranauthorMansourGhaderpooriNutrition Health Research Center, Department of Environment Health, School of Health, Lorestan Medical Sciences University, Khoramabad, IranauthorAliJafariNutrition Health Research Center, Department of Environment Health, School of Health, Lorestan Medical Sciences University, Khoramabad, IranauthorAhmadAkramiDepartment of chemistry, Tehran medical sciences branch, IslamicAzad university, Tehran,authorFatemeBaghban shahriDepartment of chemistry, Tehran medical sciences branch, IslamicAzad university, Tehran,authortextarticle2017engThis study describes the biological degradation of TNT by using induced aeration. Three plastic reactors were used. In each reactor 3 kg of soil were used. In order to increase the porosity of the soil, sawdust was added to soil. Textile wastewater treatment plant sludge was also added to soil. TNT at the concentrations of 1000 mg/kg of soil was added thereafter. Rhamnolipid biosurfactant at the concentration of 60 mg/L was added to related reactors. Aeration interval was at every 3 to 5 days. Every two weeks, sampling of soil were done to analyze the explosives. Samples were analyzed by HPLC. The results showed that at the end of 120 days, TNT removal efficiency in induced aeration in reactors containing sludge and biosurfactant was 98 percent. COD removal efficiency in induced aeration in reactors amended by rhamnolipid was 58 percent and in reactors to which rhamnolipid was not added was 41 percent. Follow-up kinetic studies revealed that explosives removal follow the pseudo first order reaction. The pseudo first-order rate constants of rhamnolipid amended experiments were at least 3.89 orders of magnitude higher for TNT than those found for experiments without rhamnolipid. Application of Rhamnolipid biosurfactant could have a protective effect against the toxicity of explosives for bacteria. Textile sludge from wastewater treatment plant can decrease the time needed for explosive removal. Growth of bacteria and degradation of explosives showed that explosives have been used as a nitrogen source. Journal of Advances in Environmental Health ResearchKurdistan University of Medical Sciences2345-39905

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2017139145http://jaehr.muk.ac.ir/article_55311_5f4b237029c0a9f35756f4808f6cbd6e.pdfdx.doi.org/10.22102/jaehr.2017.71739.1001Fabrication, characterization, and microscopic imaging of Fe2O3-modified electrospun nanofibersMohammad AminPordelStudent Research Committee, Kurdistan University of Medical Sciences, Sanandaj, IranauthorAfshinMalekiDepartment of Environmental Health Engineering, Environmental Health Research Center, Kurdistan
University of Medical Sciences, Sanandaj, IranauthorMehrdadKhamforoshDepartment of Chemical Engineering, Faculty of Engineering, University of Kurdistan, Sanandaj, IranauthorHiuaDaraeiDepartment of Environmental Health Engineering, Environmental Health Research Center, Kurdistan
University of Medical Sciences, Sanandaj, IranauthorRezaRezaeeDepartment of Environmental Health Engineering, Environmental Health Research Center, Kurdistan
University of Medical Sciences, Sanandaj, IranauthorSaeedDehestaniDepartment of Environmental Health Engineering, Environmental Health Research Center, Kurdistan
University of Medical Sciences, Sanandaj, Iranauthortextarticle2017engThis study explored the fabrication, characterization, and microscopic imaging of highly porous electrospun nanofibers based on pure and Fe2O3 nanoparticle modified polyacrylonitrile (PAN) fibers. The desired electrospinning mixture comprising polymer and nanoparticles in dimethyleformamide, was prepared. During electrospinning, the precursor solution was injected using a syringe pump. The empirical parameter influences, including nanoparticles dose, polymer weight percentage, and thickness as applied polymer syringe, were studied on the product morphology and uniformity. The products were analyzed by Fourier transform infrared (FT-IR) spectrophotometer, scanning electron microscopy (SEM), and X-ray diffraction (XRD). The results demonstrate that changes in the investigated empirical parameters cause fiber morphology variations and uniformity. Therefore, a strong interaction exists between Fe2O3 and PAN. In general, addition of nanoparticles to PAN solution resulted in a decrease in the average fiber diameter compared to pure PAN.Journal of Advances in Environmental Health ResearchKurdistan University of Medical Sciences2345-39905

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2017146153http://jaehr.muk.ac.ir/article_55678_c831117cc087e8e9603ba2355e6288f5.pdfdx.doi.org/10.22102/jaehr.2017.80173.1010The optimization of Cu and Fe bioleaching from converter slag using Acidithiobacilus ferrooxidansSaebAhmadiChemical Engineering Department, Tarbiat Modares University, Tehran, IranauthorMohsenVafaie SeftiChemical Engineering Department, Tarbiat Modares University, Tehran, IranauthorMohammad MahdiShadmanChemical Engineering Department, Tarbiat Modares University, Tehran, IranauthorZahraAzimi DijvejinChemical Engineering Department, Tarbiat Modares University, Tehran, IranauthorHooshyarHosseiniDepartment of Environmental Health Engineering, Faculty of Health, Kermanshah University of Medical Sciences, Kermanshah, Iranauthortextarticle2017engThe main objective of this work was to assess the optimization of Fe and Cu bioleaching from converter slag using Acidithiobacillus ferrooxidans. Important parameters that contribute to the bioleaching process include initial pH, initial Fe2+ concentration and pulp density. In order to optimize these parameters, the response surface methodology (RSM) was applied. The maximum simultaneous Fe and Cu recovery yields were 95% and 100%, respectively. The optimum conditions were initial pH 1.8, initial density 1.4 g/100 mL and initial Fe2+ 7.3 g/L. The comparison between chemical leaching and bioleaching results showed that bioleaching improved the recovery yields of Fe and Cu by 26% and 33%, respectively. The modified shrinking core model was used to determine the rate-limiting step of the process. It was found that diffusion through the product layer and chemical reaction are the rate controlling steps.Journal of Advances in Environmental Health ResearchKurdistan University of Medical Sciences2345-39905

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2017154162http://jaehr.muk.ac.ir/article_55849_1ed4a38ec756adadbac814b2a8c591df.pdfdx.doi.org/10.22102/jaehr.2017.81512.1013Growth characteristics and response of wheat to cadmium, nickel and magnesium sorption affected by zeolite in soil polluted with armamentsAliAzoughDepartment of Agronomy, Khuzestan Science and Research Branch, Islamic Azad University, Ahvaz, Iran |Department of Agronomy, Ahvaz branch, Islamic Azad University, Ahvaz, IranauthorSeyed KeyvanMarashiDepartment of Agronomy, Ahvaz branch, Islamic Azad University, Ahvaz, IranauthorTeimourBabaeinejadDepartment of Soil science, Ahvaz branch, Islamic Azad University, Ahvaz, Iranauthortextarticle2017engThe presence of large heavy metal concentrations in soil polluted with chemical weapons causes serious operational restrictions against cultivation of agricultural crops like wheat. To solve this problem, the usage of zeolite has been proposed as one of the most efficient practical approaches. The main objective of this research is the investigation of the influence of natural Iranian zeolite on sorption of cadmium (Cd2+) and nickel (Ni2+) and the investigation of growth characteristics of wheat in soil polluted with chemical weapons. The experiments were carried out in factorial arrangement in a randomized complete design with three replications during 2015-2016 crop season. Treatments with four levels of zeolite included: a1) 0%; a2) 0.5%; a3) 1.5%; and a4) 2.5% of soil weight and two soil samples, one obtained from out of the war zone (without contamination) (b1) and other was from contaminated soil to weapons (b2). Results showed that the polluted soil led to a significant enhancement in amount of Cd2+ and Ni2+ in shoots and roots of wheat. In addition, the findings revealed that the application of zeolite caused a significant reduction in Cd2+ and Ni2+ concentrations in shoots and roots and significantly increased dry matter, chlorophyll index and magnesium (Mg2+) concentration in wheat. In general, results showed that zeolite released nutrients and stabilized heavy metals in polluted soil and the negative effect of soil polluted by toxic heavy metals was reduced in the plant, which lead to decontamination of soil and increase in safety of environment.Journal of Advances in Environmental Health ResearchKurdistan University of Medical Sciences2345-39905

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2017163171http://jaehr.muk.ac.ir/article_55926_7b9456b5867955894fbe3b59c9c1f43c.pdfdx.doi.org/10.22102/jaehr.2017.74387.1005The efficiency of modified powdered activated carbon for removal of ammonia nitrogen from aqueous solution: a process optimization using RSM (Response Surface Methodology), adsorption isotherm and kinetic studyHatamGodiniDepartment of Environmental Health Engineering, School of Public Health, Alborz University of Medical Sciences, Karaj, IranauthorAbdollahDargahiPh.D student of Environmental Health Engineering, School of Public Health, Hamadan University of Medical Sciences, Hamadan, IranauthorLeilaTabandehDepartment of Environmental Health Engineering, School of Public Health, Social Development and Health Promotion Research Center, Kermanshah University of Medical sciences, Kermanshah, IranauthorMitraMohammadiDepartment of Environmental Health Engineering, School of Public Health, Social Development and Health Promotion Research Center, Kermanshah University of Medical sciences, Kermanshah, IranauthorYaserVaziriPh.D student of Environmental Health Engineering, School of Public Health, Hamadan University of Medical Sciences, Hamadan, IranauthorMir MohammadHoseini AhaghDepartment of Public Health, Khalkhal School of Medicine, Ardabil University of Medical sciences, Ardabil,
IranauthorKiomarsSharafiDepartment of Environmental Health Engineering, School of Public Health, Social Development and Health Promotion Research Center, Kermanshah University of Medical sciences, Kermanshah, IranauthorZahraJalilianDepartment of Environmental Health Engineering, School of Public Health, Social Development and Health Promotion Research Center, Kermanshah University of Medical sciences, Kermanshah, Iranauthortextarticle2017engThe objective of this study was to determine the performance of modified commercial powdered activated carbon (MCPAC) in removal of ammonia from aqueous solution. The effects of adsorbent dosage (0.5–1.5 g/L), ammonia concentration (100–200 mg/L), pH (3 to 9) and contact time (2 to 120 min) were examined. In this study, experiments were performed based on Response Surface Methodology (RSM). The adsorption isotherm was evaluated using Freundlich and Langmuir models. Kinetics study was analyzed using pseudo first order, pseudo second order and particle penetration kinetic models. By increasing adsorbent dosage, pH and contact time, the removal efficiency increased. According to CCD results, the MCPAC was fitted to a quadratic equation. Also, ammonia adsorption for MCPAC followed the Langmuir (R2 = 0.9831) isotherm model. The maximum adsorption capacity for MCPAC was 40.323 mg/g. The analysis of adsorption kinetic for MCPAC indicated that ammonia adsorption was well fitted by the pseudo second order kinetic model. As thus, we concluded that MCPAC could be considered as an appropriate and economical alternative adsorbent for water and wastewater treatment due to its high ammonia adsorption capacity.Journal of Advances in Environmental Health ResearchKurdistan University of Medical Sciences2345-39905

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2017172182http://jaehr.muk.ac.ir/article_56034_4b5388b1fd64096b9fbfaa124bed8876.pdfdx.doi.org/10.22102/jaehr.2017.93007.1028Patients satisfactory from outdoor and indoor environments of a training hospitalAfsaneChavoshaniPh.D. of Environmental Health Engineering,
School of Health, Isfahan University of Medical Sciences. Isfahan-IranauthorAsadollahShamsHealthcare Services Management group, Isfahan University of Medical Sciences Management and Medical Informatic CollegeauthorAkbarHassanzadehDepartment of Epidemiology and Biostatistics Health school, Isfahan University of Medical SciencesauthorMajidHashemiDepartment of Environmental Health Engineering, Faculty of Public Health, Kerman University of Medical
Sciences, Kerman, Iranauthortextarticle2017engRespect to the design guidelines of building environments is a complex subject that associated with cultural and economic development of human societies. Therefore, accurately measuring users’ favorites for environment design is a essential subject to optimize the relationship between environmental and personal parameters. This study with the purpose of investigation of patients satisfactory from outdoor and inddor environment dimensions was performed in the one of the hospital in Isfahan city in Iran in 2015. Data were collected from all hospital wards by a questionare and environmental health check list . This questionnaire was including questions about patients satisfactory from indoor and outdoor environment dimentions of the hospital. The statistical tests including Independent samples T test, Pearson Correlation, Spearman Correlation, and paired sample T test applied by SPSS. According to these results, the mean of total satisfactory scores from indoor and outdoor spaces were 62.3 and 80.5%, respectively. Paired sample T test showed that the average patients satisfactory score from outdoor view was significantly higher than indood view(P<0.001). Among outdoor view items, the lowest and highest satisfactory were allocated to disruption and construon activiticties(50%) and green natural space(69.4%), respectively, while, the lowest and highest satisfactory were allocated to access to sanitation/cleanliness of toilets(21%) and lighting(57.9%), repectively. Obtained results showed that the mean total scores of satisfactory from outdoor and indoor environments was in acceptable level.Journal of Advances in Environmental Health ResearchKurdistan University of Medical Sciences2345-39905